Figure 5.

Projection maps and three‐dimensional reconstruction of His₆‐CotYc crystals.

A. Averaged contoured projection map of negatively stained His₆‐CotYc two‐layered crystal with threefold (p3) symmetry enforced. Solid contours represent density below the mean (i.e. stain‐excluding). Scale bars represent 43 Å.

B. Projection map calculated from one hexagonal form crystal with sixfold (p6) symmetry imposed. Contours as in (A). The hexagon symbol represents the crystallographic sixfold symmetry axis. Scale bars represent 43 Å.

C and D. Three‐dimensional surface representations of negatively stained two‐layered crystal form with p3 symmetry enforced. Dark regions represent highly stained parts of the crystal. Scale bars represent 86 Å.